Generate HDF5 key for CVC 'correlators' meson 3pt function with a local or derivative insertion The key for a meson three-point function has the form: /sud+-g-u-g/t10/dt12/gf5/pfx0pfy0pfz0/gc0/Ddim0_dir0/Ddim1_dir1/D.../gi5/pix0piy0piz0 where, from left to right:

'u' is the flavour of the "backward" propagator
'd' is the flavour of the "sequential" propagator
'+' indicates that 'sud' is daggered
'g' indicates a gamma insertion
'u' is the flavour of the foward propagator
'g' indicates a Dirac structure at the source
'tXX' is the source time slice
'dtYY' is the source-sink separation
'gfN' gamma structure at the sink in CVC indexing
'pfxXpfyYpfzZ' is the sink momentum in CVC convention (sink and source phases are both e^ipx)
'gcN' gamma structure at the current insertion point in CVC indexing
'DdimJ_dirK' covariant displacement applied in dimension 'J', direction 'K' where it should be noted that this is. in operator notation, i.e., the right-most displacement is the one applied first.
...
'giN' gamma structure at the souce in CVC indexing
'pixXpiyYpizZ' at the source in CVC convention

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Functions in hadron (3.1.2)